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Un article trouvé pour ce sujet.
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Geometry |
2001-04-21 |
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Rebecca pose la question :
How do you prove the following:
Let CD be an altitude of triangle ABC and assume that angle C=90 degrees. Let r1 and r2 be the inradii of triangle CAD and CBD, respectively, and show that r+r1+r2=CD, where r is the inradius of triangle ABC.
Chris Fisher lui répond. |
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